class aa{

        public aa(String name){
            System.out.println("我是一名："+name);
        }
}


class Doog extends aa{
    public Doog(){
        super("黑暗骑士");
    }
}

public class Example288{
    public static void main(String[]args){

        Doog doog=new Doog();
    }
}
